as your profile has no indication of your locale, I have to mention that coolant cocktail is great for reducing heat, but if you live in an area (as I do) where winter storage temperatures dip down low, you may be doing 2 coolant changes a year, one for storage, one for riding season... which gets costly...
but, you can recoup and store the 'winter antifreeze' for the summer, as you arent' really abusing it, it just sits and protects...during the cold months... and you get to rinse the system twice as many times, which doesn't hurt anything at all...
may start doing this myself actually, even tho I don't have any heat issues on my C14.... it does need a flush and refill tho..
oh, and don't waste money on de-ionized water.... as soon as you pour it into an aluminum engine/cooling system, it becomes ionized water... basic chemistry, and no benefit whatsoever... distilled water is the best, and logical, water... but all todays coolants come premixed, so just drain, flush, pour, and go.